1) There isn’t a cloud in the sky, but it was cloudy in the morning.
2) Mrs. Clay usually finishes her work at half past three, but she finished it later yesterday afternoon.
3) Every day I help Mom about the house, but last week I was very busy with my exam. So I didn't help her much.
4) Tom isn’t playing tennis tomorrow afternoon, he didn't play tennis yesterday.
5)We generally have lunch at 12.30, but yesterday we had lunch later.
6) Now my brother smokes a lot, but he didn't smoke before.
7) The Frasers live in a four-room apartment, but last year they lived in a small house in the country.
8) I don’t eat meat at all, but the other day I visited my friends and ate pork there.
9) My Dad always goes to work by car, but last week he went to work on foot.
10) The weather is nice today, but it was bad yesterday.